ME 160: Mechanical Engineering Drawing-I
Introduction
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Drawing is a graphic language
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Drawing is the language of engineers
Basic Views
In general, there are 2 types of views
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2 dimensional views
Orthographic View
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3 dimensional views
Dimetric View
Trimetric View
Isometric View
Orthographic Views and Isometric Views will be of our main
interest in this course.
Views of a Solid
A solid object has 6 sides.
Six Orthographic Views can be drawn from six sides.
Projected Views on a Plane
Orthographic Views are generated by projecting the edges of a
solid on a plane.
Types of Projection
There are 2 types of projection
First angle projection
Viewer
Object
Projection
plane
Third angle projection
Viewer
Projection
plane
Relative position of viewer, object and projection plane
Object
Formation of Quadrants
1st Quadrant
3rd Quadrant
A Solid Block
TOP
FRONT
RIGHT HAND SIDE
Whichever projection system we follow, views will be drawn for the sides that are
visible to us.
Placement of Solid
First Angle Projection
Third Angle Projection
First Angle Projection
Viewer
Object
Projection
plane
Third Angle Projection
Viewer
Projection
plane
Object
Solid Block Observation
TOP
FRONT
RIGHT HAND SIDE
Whichever projection system we follow, views will be drawn for the sides that are visible to us.
Solid Block Observation
TOP
FRONT
RIGHT HAND SIDE
Whichever projection system we follow, views will be drawn for the sides that are visible to us.
Solid Block Observation
TOP
FRONT
RIGHT HAND SIDE
Whichever projection system we follow, views will be drawn for the sides that are visible to us.
Solid Block Observation
TOP
FRONT
RIGHT HAND SIDE
Whichever projection system we follow, views will be drawn for the sides that are visible to us.
Development of Views
TOP
FRONT
RIGHT HAND SIDE
Whichever projection system we follow, views will be drawn for the sides that are visible to us.
Development of Views
TOP VIEW
FRONT VIEW
RHS VIEW
Development of Views
TOP
FRONT
RIGHT HAND SIDE
Whichever projection system we follow, views will be drawn for the sides that are visible to us.
Development of Views
TOP VIEW
FRONT VIEW
RHS VIEW
Development of Views
Different types of lines
(Different line thickness for different types of lines)
Object line
Hidden line
Center line
Cutting plane line
Instruments
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Drawing board/table
Drawing sheet
Drafting tape
T-square
Set square
Compass and divider
Pencil (HB, 2B)
Eraser
Set-Squares
Compass and Divider
To draw circles and round edges Compass and Divider will be used
Preparing Drawing Table
Preparing Drawing Table
Preparing Drawing Table
Affix 4 corners of the
drawing sheet like this
With the help of
drafting tape
Use of Set-squares and T-Square
Draw a horizontal line
Draw a vertical line
Draw Parallel lines
Draw Inclined lines
Drawing Sheet Preparation
Drawing Sheet Preparation
See You in the Class
Have a Nice Time!